BM78 Bluetooth® 4.2 Dual-Mode Module

1 2016 Microchip Technology Information DS60001380A-Page 1BM78 Features bluetooth Classic (BR/EDR) and Low Energy (LE) Certified to FCC, IC, MIC, KCC, and NCC radio regulations European R&TTE Directive Assessed Radio mod-ule bluetooth SIG qualified Transparent UART mode for seamless serial data over UART interface Easy to configure with User Interface (UI) tool, a Windows configuration utility or directly by MCUs Firmware can be upgraded in the field over UART (Flash version) Integral chip antenna (BM78 SPPS5MC2/NC2) or external antenna (BM78 SPP05MC2/NC2) Integrated crystal, internal voltage regulator, and matching circuitry Configurable I/O pins for control and status Supports Apple iPod Accessory Protocol (iAP2), (only BM78 SPPx5MC2) Supports bluetooth LE secure connections bluetooth LE data packet length extension Small and compact surface mount Module Castellated SMT pads for easy and reliable PCB mounting Ideal for portable battery operated devices One LED driver with 16 steps brightness controlRF/Analog Frequency: GHz to GHz Receive Sensitivity: -90 dBm (BR/EDR), -92 dBm (LE) Class 2 output power (+ dBm typical)Data ThroughputData Throughput at 1 Mbps UART baud rate: BR/EDR: up to 32 Kbps LE: up to 7 Kbps Data Throughput at 115200 bps UART baud rate BR/EDR: upto 10 Kbps LE: up to 6 KbpsMAC/Baseband/Higher Layer Secure AES128 encryption bluetooth : GAP, SPP, SDP, RFCOMM, and L2 CAP bluetooth : GAP, GATT, ATT, SMP, and L2 CAPO perating Conditions Operating voltage range: to Operating temperature.

2 -20 C to +70 C Applications Internet of Things (IoT) Secure Payment Home and Security Health and Fitness Industrial and Data Logger LED Lighting (16 configurations) bluetooth Dual-Mode ModuleBM78 DS60001380A-Page 2 Advance Information 2016 Microchip Technology DescriptionThe BM78 Module is a fully-certified, bluetooth Module for customers to easily add dual -modeBluetooth wireless capability to their products. TheBM78 is built around Microchip's IS1678 Bluetoothdual-mode Module , and it is available in ROM-based(BM78 SPPx5NC2) and Flash-based (BM78 SPPx-5MC2) versions. Refer to Section OrderingInformation for additional information on the BM78 bridges the customer products to smartphones or tablets for convenient data transfer, control,and access to cloud applications delivering local con-nectivity for IoT. The BM78 supports GAP, SDP, SPP,and GATT profiles.

3 Data transfer is achieved throughthe bluetooth link by sending or receiving data throughtransparent UART mode, making it easy to integratewith any microprocessor or Microcontroller (MCU) witha UART interface. It also enables a easy configurationby using a UI tool, a Windows configuration utility, ordirectly through UART by MCUs. 2016 Microchip Technology Information DS60001380A-Page 3BM78 Table of System Overview .. Application Information .. Operating Pattern .. Electrical Characteristics .. Radio Characteristics .. Physical Dimensions .. Reflow profile .. Module Placement .. Ordering Information .. 49 Appendix A: Certification Notices .. 51TO OUR VALUED CUSTOMERSIt is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Microchipproducts. To this end, we will continue to improve our publications to better suit your needs.

4 Our publications will be refined andenhanced as new volumes and updates are introduced. If you have any questions or comments regarding this publication, please contact the Marketing Communications Department viaE-mail at or fax the Reader Response Form in the back of this data sheet to (480) 792-4150. Wewelcome your Current Data SheetTo obtain the most up-to-date version of this data sheet, please register at our Worldwide Web site at: can determine the version of a data sheet by examining its literature number found on the bottom outside corner of any last character of the literature number is the version number, ( , DS30000000A is version A of document DS30000000).ErrataAn errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may exist for currentdevices. As device/documentation issues become known to us, we will publish an errata sheet. The errata will specify the revisionof silicon and revision of document to which it determine if an errata sheet exists for a particular device, please check with one of the following: Microchip s Worldwide Web site; Your local Microchip sales office (see last page)When contacting a sales office, please specify which device, revision of silicon and data sheet (include literature number) you Notification SystemRegister on our web site at to receive the most current information on all of our DS60001380A-Page 4 Advance Information 2016 Microchip Technology : 2016 Microchip Technology Information DS60001380A-Page OVERVIEWThe BM78 Module is a fully certified, embedded GHzBluetooth version (BR/EDR/LE) wireless Module .

5 Itincludes an on board bluetooth stack, a power manage-ment subsystem, a GHz transceiver, and an RFpower amplifier. Customers can embed bluetooth func-tionality into any applications using the BM78 enables rapid product development andfaster time to market, and it is designed to provide inte-grators with the following features: Simple integration and programming Reduced development time Superior wireless Module with low-cost system Interoperability with bluetooth host Wide range of applicationsThe BM78 has four Stock Keeping Units (SKUs). Foradditional information on SKUs, refer to Section Ordering Information . The BM78 SPPS5MC2/NC2is a complete and fully regulatory certified Module withan integral ceramic chip antenna and RF shield. TheBM78 SPP05MC2/NC2 is a low-cost alternative withRF out PAD (for external antenna) and no RF integrator is responsible for the antenna, antennamatching, and regulatory BM78 is a small, compact, and surface mountedmodule with castellated pads for easy and reliable hostPCB mounting.

6 It is compatible with standardpick-and-place equipment and can independently main-tain a low-power wireless connection. Low power usageand flexible power management maximize the lifetime ofthe BM78 in battery-operated devices. A wide operatingtemperature range enables its applications in indoor andoutdoor environments. Figure 1-1 illustrates the internalblock diagram of the 1-1:INTERNAL BLOCK DIAGRAM OF BM78BM78 DS60001380A-Page 6 Advance Information 2016 Microchip Technology 1-1 provides various pins of theBM78 SPPx5MC2/NC2 1-1:PIN DESCRIPTIONS5 Pin05 PinSymbolTypeDescription1 GNDP owerGround reference2 GNDP owerGround reference31 GNDP owerGround reference42 BAT_INPowerBattery Input ( to )Main positive supply inputConnect to 10 uF (X5R/X7R) capacitor53SW_BTNDIS oftware Button H: Power On L: Power Off64 LDO33_OPowerInternal LDO output, can source no more than 50 mA75 VDD_IOPowerI/O positive supply input.

7 Internal use only, do not con-nect to other devices86 LDO18_OPowerInternal LDO output. Internal use only, do not con-nect to other devices97 WAKEUPDIW akeup from Sleep mode (active- low)(internal pull-up)108 PMULDO_OPowerPower management unit output. Internal use only, do not connect to other devices119P0_4 DOStatus Indication pin along with P1_5, refer to Table 2-31210P1_5 DOStatus Indication pin along with P0_4, refer to Table 2-31311P1_2/SCLDOI2C SCL1412P1_3/SDADIOI2C SDA1513P1_7/CTSDIOC onfigurable Control or Indication pin or UART CTS (input)1614P0_5 DIOC onfigurable Control or Indication pin1715P0_0/RTSDIOC onfigurable Control or Indication pin or UART RTS (output)1816P2_0 DISystem configuration pin along with P2_4 and EAN pins, used to set the BM78 in any one of the following three modes: Application mode (for normal operation), Test mode (to change EEPROM values), and Write Flash mode (to enter the new firmware into the Module ), refer to Table 2-11917P2_4 DISystem configuration pin along with P2_0 and EAN pins, used to set the Module in any one of the following three modes.

8 Application mode (for normal operation), Test mode (to change EEPROM values), and Write Flash mode (to enter new firmware into the Module ), refer to Table 2-1 Legend:A = AnalogD = Digital I = Input O = Output 2016 Microchip Technology Information DS60001380A-Page 7BM782018 EANDIE xternal address-bus negative System configuration pin along with P2_0 and P2_4 pins, used to set the Module in any of the three modes: Application mode (for normal operation), Test mode (to change EEPROM values), and Write Flash mode (to enter new firmware into the Module ), refer to Table 2-1 ROM: Must be pulled high to VDD_IOFLASH: Must be pulled down with to GND2119 RST_NDIM odule Reset (active-low) (internal pull up)Apply a pulse of at least 63 ns2220 RXDDIUART data input2321 TXDDOUART data output2422P3_1 DIOC onfigurable Control or Indication pin (Internally pulled-up, if configured as an input)2523P3_2 DIOC onfigurable Control or Indication pin(Internally pulled-up, if configured as an input)2624P3_3 DIOC onfigurable Control or Indication pin(Internally pulled-up, if configured as an input)2725P3_4 DIOC onfigurable Control or Indication pin(Internally pulled-up, if configured as an input)2826P3_6 DIODo not connect2927P3_7 DIOC onfigurable Control or Indication pin(Internally pulled-up, if configured as an input)3028 LED1 DOStatus LED, connect to LDO33_03129 GNDP owerGround reference 30BT_RFAIOE xternal antenna connection(50 ohms)32 GNDP owerGround referenceLegend:A = AnalogD = DigitalI = Input O = OutputTABLE 1-1.

9 PIN DESCRIPTION (CONTINUED)S5 Pin05 PinSymbolTypeDescriptionBM78 DS60001380A-Page 8 Advance Information 2016 Microchip Technology 1-2 and Figure 1-3 illustrate the pin diagrams ofthe BM78 SPPS5MC2/NC2 and BM78 SPP05MC2 1-2:BM78 SPPS5MC2/NC2 PIN DIAGRAM 2016 Microchip Technology Information DS60001380A-Page 9BM78 FIGURE 1-3:BM78 SPP05MC2/NC2 PIN DIAGRAMBM78 DS60001380A-Page 10 Advance Information 2016 Microchip Technology : 2016 Microchip Technology Information DS60001380A-Page ConfigurationThe I/O pins, P2_0, P2_4 and EAN, place the BM78into operating mode and each of these pins have inter-nal pull up and allow configuration settings and firm-ware to be updated from UART. Table 2-1 providessystem configuration 2-1:SYSTEM CONFIGURATION and Indication I/O PinsThe I/O pins, P0_0, P0_5, P1_7, P3_1, P3_2, P3_3,P3_4, and P3_7, are configurable control and indica-tion pins.

10 The control signals are inputs to the BM78and the indication signals are outputs from the 2-2 provides default I/O pin configuration 2-2:CONTROL AND INDICATION I/O PIN ASSIGNMENTSNote 1:The RTS pin can only be assigned to P0_0 and the CTS pin can only be assigned to :The RTS and CTS pins can be configured as GPIOs if flow control is ModeBM78 SPPx5NC2 (ROM Variant)LowHighHighWrite EEPROM and test modeHighHighHighNormal operation/application modeBM78 SPPx5MC2 (Flash Variant)LowLowHighWrite FLASHLowHighLowWrite EEPROM and test modeHighHighLowNormal operational/application modePINSN/CUART_RTS(1,2)UART_CTS(1,2)LOW _BATTERY_INDRSSI_INDGET WIFI INFO KEYLINK_DROP_CONTROL (DISCONNECT)UART_RX_INDPAIRING_KEYINQUIR Y CONTROLPROFILE_INDP0_0 P0_5 P1_7 P3_1 P3_2 P3_3 P3_4 P3_7 BM78 DS60001380A-Page 12 Advance Information 2016 Microchip Technology Indication I/O PinsThe I/O pins, P1_5 and P0_4, are status indicator pins:Status_IND_1 and status_IND_2.